propionic acid, 2-amino-3-indol-3-yl-
Dietary supplement, nutrient Tryptophan is one of the 20 standard amino acids, as well as an essential amino acid in the human diet. Only the L-stereoisomer of tryptophan is used in structural or enzyme proteins, but the D-stereoisomer is occasionally found in naturally produced peptides (for example, the marine venom peptide contryphan). (Wikipedia)
  • Penta International
    • Penta International Corporation
      Chemistry innovation
      At Penta, our products and services help businesses do business better.
      For over 30 years, Penta Manufacturing Company has played a growing role in worldwide chemistry innovations and applications. As an industry leader, Penta continues to pioneer chemistry-based solutions for practically every area of commerce. Our products and expertise have helped fuel technical advances in dozens of commercial applications including flavoring, coloring, fragrances and chemical processes.
      US Email: Technical Services
      US Email: Sales
      US Voice: (973) 740-2300
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      20-85800 DL-TRYPTOPHAN, Kosher
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2-amino-3-(1H-indol-3-yl)propanoic acid (Click)
CAS Number: 54-12-6Picture of molecule
ECHA EINECS - REACH Pre-Reg: 200-194-9
Nikkaji Web: J314.694D
Beilstein Number: 86196
MDL: MFCD00064339
XlogP3: -1.10 (est)
Molecular Weight: 204.22904000
Formula: C11 H12 N2 O2
BioActivity Summary: listing
NMR Predictor: Predict (works with chrome or firefox)
Category: cosmetic agents
US / EU / FDA / JECFA / FEMA / FLAVIS / Scholar / Patent Information:
Google Scholar: Search
Google Books: Search
Google Scholar: with word "volatile"Search
Google Scholar: with word "flavor"Search
Google Scholar: with word "odor"Search
Google Patents: Search
US Patents: Search
EU Patents: Search
IBM Patents: Obtain
Pubchem Patents: Search
PubMed: Search
NCBI: Search
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Physical Properties:
Assay: 95.00 to 100.00 % 
Food Chemicals Codex Listed: No
Melting Point: 230.00 °C. @ 760.00 mm Hg
Boiling Point: 447.90 °C. @ 760.00 mm Hg (est)
Flash Point: 436.00 °F. TCC ( 224.70 °C. ) (est)
logP (o/w): 1.040 (est)
Soluble in:
 water, 2848 mg/L @ 25 °C (est)
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Organoleptic Properties:
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Cosmetic Information:
CosIng: cosmetic data
Cosmetic Uses: antistatic agents
hair conditioning
masking agents
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George Uhe Company
Glentham Life Sciences
Penta International
Santa Cruz Biotechnology
For experimental / research use only.
DL-Tryptophan 99%
Sigma-Aldrich: Aldrich
For experimental / research use only.
DL-Tryptophan ≥99%
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Safety Information:
Preferred SDS: View
Hazards identification
Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)
None found.
GHS Label elements, including precautionary statements
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
intraperitoneal-mouse LD50  > 1000 mg/kg
Biochemical Pharmacology. Vol. 15, Pg. 2134, 1966.

Dermal Toxicity:
Not determined
Inhalation Toxicity:
Not determined
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Safety in Use Information:
Category: cosmetic agents
Recommendation for dextro,laevo-tryptophan usage levels up to:
 not for fragrance use.
Recommendation for dextro,laevo-tryptophan flavor usage levels up to:
 not for flavor use.
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Safety References:
EPI System: View search
Daily Med: search
Chemical Carcinogenesis Research Information System: Search
Cancer Citations: Search
Toxicology Citations: Search
EPA GENetic TOXicology: Search
Env. Mutagen Info. Center: Search
EPA Substance Registry Services (TSCA): 54-12-6
EPA ACToR: Toxicology Data
EPA Substance Registry Services (SRS): Registry
Laboratory Chemical Safety Summary : 1148
National Institute of Allergy and Infectious Diseases: Data
WGK Germany: 1
 2-amino-3-(1H-indol-3-yl)propanoic acid
Chemidplus: 0000054126
RTECS: YN6129200 for cas# 54-12-6
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 2-amino-3-(1H-indol-3-yl)propanoic acid
NIST Chemistry WebBook: Search Inchi
Canada Domestic Sub. List: 54-12-6
Pubchem (cid): 1148
Pubchem (sid): 134971646
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Other Information:
(IUPAC): Atomic Weights of the Elements 2009
(IUPAC): Atomic Weights of the Elements 2009 (pdf)
Videos: The Periodic Table of Videos
tgsc: Atomic Weights use for this web site
(IUPAC): Periodic Table of the Elements
Golm Metabolome Database: Search
KEGG (GenomeNet): C00806
HMDB (The Human Metabolome Database): HMDB30396
FooDB: FDB002251
Export Tariff Code: 2933.90.1000
MedlinePlusSupp: View
VCF-Online: VCF Volatile Compounds in Food
ChemSpider: View
Wikipedia: View
RSC Learn Chemistry: View
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Potential Blenders and core components note
None Found
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Potential Uses:
 antistatic agents 
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Occurrence (nature, food, other): note
 found in nature
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 alanine, 3-indol-3-yl-
2-amino-3-(1H-indol-3-yl)propanoic acid
(±)-2-amino-3-(3-indolyl)propionic acid
2-amino-3-(lH-indol-3-yl)-propanoic acid
2-amino-3-indol-3-ylpropionic acid
DL-a-amino-3-indolepropionic acid
2-amino-3-indolylpropanic acid
2-amino-3-indolylpropanoic acid
a-aminoindole-3-propionic acid
 indole-3-propionic acid, a-amino-
 propionic acid, 2-amino-3-indol-3-yl-
 tryptophan, DL-
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